EP3864343B1 - Light module - Google Patents
Light module Download PDFInfo
- Publication number
- EP3864343B1 EP3864343B1 EP19871611.0A EP19871611A EP3864343B1 EP 3864343 B1 EP3864343 B1 EP 3864343B1 EP 19871611 A EP19871611 A EP 19871611A EP 3864343 B1 EP3864343 B1 EP 3864343B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- headlamp
- leds
- led
- guides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/26—Elongated lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
Definitions
- Embodiments of this invention relate to a vehicle headlamp. More specifically, embodiments of this invention relate to the optics used to light emitted by plural light sources for vehicles.
- Vehicle headlamps come in numerous different configurations. It is known to use LEDs as the or one of a plurality of light sources on the vehicle. Further, numerous sorts of reflector, lens, and other light modifying arrangements are known in the industry.
- lighting devices for vehicle headlights having an array of separate lighting elements.
- Light emitted from an array of LEDs is propagated through a number of conical silicone light guides and then directed through a number of lenses such that light from each light guide is simultaneously led through a main lens and a neighboring secondary lens in order to provide a more homogenous appearance of the overall lighting device.
- a vehicle headlamp according to the invention comprises the features of claim 1.
- some of the LEDs can be dimmed to avoid glare to a selected location.
- a control system is electronically connected with the LEDs, and can selectively illuminate at least some LEDs in the plurality, and deactivate others.
- the reflector body substantially prevents bleeding of light to the deactivated LED/reflector/light guide system.
- the body is formed of silicone, optionally reflective white silicone.
- the light guides are formed of transparent silicone.
- the body can, in embodiments, be a substantially-solid mass.
- the LEDs can be arranged in a substantially linear array, and the light emitted from at least a first of the LEDs can be modified by a first light guide and a first discrete reflector arrangement defined by the body to create a light pattern which is different from a plurality of light patterns created by the other LEDs.
- a lens arrangement is also disclosed.
- the lens can be configured to receive an illumination pattern received from the plurality of LEDs, and project into a more collimated pattern.
- the lens is a condenser lens.
- the lens is extended in the direction of the aligned plurality of LEDs.
- the module includes a first light-emitting diode (LED) oriented to emit in a first direction; a second LED oriented to emit in a second direction; first and second reflectors defined into a body; the first reflector oriented to modify light received from the first LED, and the second reflector oriented to modify light received from the second LED; first and second light guides included in the first and second reflectors, respectively; and the first light guide configured to receive and direct light from the first LED and the second light guide configured to receive and direct light from the second LED.
- LED light-emitting diode
- This embodiment might include a control system electronically connected with the first and second LEDs, the control system configured to selectively illuminate either or both of the first and second LEDs. It also might be arranged where the first and second reflectors are formed into a body of reflective material.
- the first and second light guides might be formed from a transparent material. Also, the first and second reflectors might be made of white silicone, and the first and second light guides be made of transparent silicone.
- a condenser lens can be oriented to receive light exiting the first and second light guides.
- the lens may extend in the direction in which the first and second LEDs are aligned.
- Embodiments of the present invention include a module for a headlamp.
- FIGs. 1-3 show an embodiment of the module 100, which is, in embodiments, a headlamp for a vehicle Module 100, shown in the figures, includes additional components not depicted in FIG. 1 for clarity of illustration.
- the module has light emission and light modifying components 102 and 104.
- Light emission equipment 102 includes a plurality of light-emitting diodes (LEDs) 106 mounted on a printed circuit board (PCB) 108.
- the LEDs 106 may be used as light sources for the headlamp 100, either exclusively or in combination with other types of lamps. In embodiments, LEDs 106 are individually addressable.
- the light emission arrangement 102 is configured for enabling selective illumination of the discrete LEDs in the array for the purpose of creating different light patterns.
- the PCB 108 includes or is connected to electronics designed to control the LEDs.
- the electronic controls may include a headlamp control module having one or more of a computer, a microcontroller, a microprocessor, or a programmable logic controller (PLC) located onboard the vehicle and communicatively coupled with the LED matrices via the one or more printed circuit boards.
- the controller includes a memory, including a non-transitory medium for storing software, and a processor for executing instructions of the software.
- the memory may be used to store information used by the controller, including but not limited to algorithms, lookup tables, and computational models.
- the controller may include one or more switches (e.g., for performing pulse-width modulation). Communication between the controller and the LED/PCB may be by one of a wired and/or wireless communication media.
- the individual LEDs in plurality 106 are each individually addressable. This enables only certain LEDs to be illuminated if desired in order to create a particular light pattern. For example, substantially all of the LEDs 106 might be illuminated if the desired pattern is intended as a high-beam for the headlight. Alternatively, in the event a low-beam pattern is desired, one or more LEDs in plurality 106 might not be activated to aid in creating the desired pattern. Still further, the selective illumination of particular LEDs might be only one factor in creating a desired pattern using reflection, or one or more lens arrangements.
- one or more LEDs in the plurality 106 might be intended for a location at which it is desired to darken based on a dynamic consideration. For example, systems on the vehicle might detect an oncoming vehicle approaching in a particular segment. By selectively turning off one or more LEDs in plurality 106 which would ordinarily be projecting into that segment, glare caused to the oncoming driver may be eliminated.
- the disclosed module avoids this using the fully divided module 100.
- the light modifying component 104 of the module 100 is divided into a light-guiding section 110, and a lens 112 from which light exits.
- the lens 112 is a condenser lens that is used to take the diverging pattern and project it in a more collimated pattern.
- the condenser lens 112 is extended in the direction of the aligned plurality of LEDs 106.
- the individually-addressable LEDs 106 emit into corresponding LED light-entry points 114.
- a space is created between the LEDs 106 and each entry point 114, in an embodiment, by containing each in a housing (not shown).
- the coupling together of the PCB 108 to the modifying component 104 is done so that each LED 106 lines up with a respective light-entry point 114.
- the space created between the LEDs 106 and the entry points 114 is manifested as a gap 122.
- the light received into each of the points 114 travels through each of a plurality of substantially transparent silicone light guides 116.
- All outer surfaces of the silicone light guides 116 are contained in a reciprocally-shaped reflective white silicone body 118.
- white reflective silicone body 118 creates internal as well as other reflection which redirects the light in a desired pattern out of the guide in the direction of the lens 112.
- the immersion of the light guides 116 into the white reflective body 118 results in reflective dividing ridges 120 of white reflective silicone (when the device is viewed in the top view of the section of FIG. 1 ).
- the light guides are comprised of outwardly tapering/conical outer surfaces 121 up to the point they reach lens 112.
- the cross-section of FIG. 2 is taken from the line indicated as 2-2 in FIG. 1 .
- the opposed conical inner wall surfaces 119 of the white silicone body contain the light, and will prevent light bleed upon ultimate transmission out of the module.
- the ridges 120 from FIG. 2 appear as spaces between each light guide in FIG. 3 .
- the circular outputs into the lens 120 from the light guides 116 would be offset to an extent to provide more spread, or to meet some other optical directional objective.
- each light guide in plurality 114 extends toward the lens, and then at a head 123 of each guide 116, a shelf 124 is formed, on which underside ledge 126 of each light guide 116 abuts. Also at head 123, an outside cylindrical surface 128 of light guide 116 is configured to be received into an interior cylindrical surface 130 formed in the reflective white silicone body 118, and then abuts surface 128 on the head 123 of each light guide 116.
- conical reflectors in the disclosed embodiment, are defined into a substantially solid silicone body, those skilled in the art will recognize that a different arrangement where silicone or other reflective materials are deposited on less solid or hollow reflector forms could be used instead and still fall within the scope of the broad concepts disclosed herein.
- the figures show all of the LED/reflector/light guide arrangements defined in the module 100 as being substantially the same, that is not necessarily or even ideally the case.
- the individual LEDs in plurality 106 are in many instances individually addressable to create different lighting patterns to create different light patterns due to the LEDs in array 106 which are selected to create the desired light pattern. Therefore, (i) the LEDs each might be spaced differently behind each light entry point; (ii) each reflector defined within the body might have a different configuration or direction to aim light differently and differently contribute to an overall pattern; and (iii) the light guides may have different configurations within the body to create various effects. This might involve diversity in the central axis for different light guides, as well as deviations from the conical shapes shown, as well as lens spacing and lens configurations.
- the overall shape of the PCB 108 is substantially or completely rectangular, and substantially matches the shape of a rear wall 132 of the light modifier system 104. More generally, the module is formed as some sort of "block.”
- block as used herein, is not intended to imply any particular shape other than that is a mass of some uniformity (e.g., could have rounding, be somewhat elliptical, etc.) Thus, the term should not be narrowly construed.
- the rear wall 132 comprises the entry point walls 134 and back portion of the body 118, which exist, in embodiments, in substantially the same plane, or are slightly offset in parallel planes. Because the back portion of the body 118 and the shape of the PCB 108 are substantially the same, prefabricated LED positions can be easily mated with the light-entry points 114 so that the two are optically in line. This makes the device easier to manufacture. Although not shown, it is possible that spacing devices of some sort exist between the forward surface of the PCB 108 and the rear wall 132 of the body 118 (or are incorporated into the housing) in order to create uniform spacing of a given dimension, ensuring that the front of the PCB 108 and the rear body surface 132 are opposed and parallel.
- the light source and light modifier systems 102 and 104 project a beam pattern in front of a vehicle.
- This pattern could include a high-beam pattern, a low beam pattern, or any other pattern.
- the pattern may be a reaction to a detected status, e.g., the presence and location of an on-coming vehicle.
- the overall configuration causes the light to propagate through each distinctive light guide portion to the exit optics.
- the containment of the light prior to entering the lens prevents light bleed.
- the block-like shape of the overall device makes the matching up of parts (e.g., PCB to light guide module to lens) easy to achieve, and additionally, the silicone body configuration facilitates easy locating and attachment and reattachment into a vehicle housing.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
- Embodiments of this invention relate to a vehicle headlamp. More specifically, embodiments of this invention relate to the optics used to light emitted by plural light sources for vehicles.
- Vehicle headlamps come in numerous different configurations. It is known to use LEDs as the or one of a plurality of light sources on the vehicle. Further, numerous sorts of reflector, lens, and other light modifying arrangements are known in the industry.
- In patent applications
DE 10 2012 204 605 andDE 10 2009 053 581 , lighting devices for vehicle headlights are disclosed having an array of separate lighting elements. Light emitted from an array of LEDs is propagated through a number of conical silicone light guides and then directed through a number of lenses such that light from each light guide is simultaneously led through a main lens and a neighboring secondary lens in order to provide a more homogenous appearance of the overall lighting device. - In
US 2015/0377453 A1 it is proposed to arrange an array of reflection holes in a lighting device such that the reflective elements have varying distances to a lens based on their distance from the optical axis in order to reduce spherical aberration. - A vehicle headlamp according to the invention comprises the features of claim 1.
- In embodiments, some of the LEDs can be dimmed to avoid glare to a selected location. In other embodiments, a control system is electronically connected with the LEDs, and can selectively illuminate at least some LEDs in the plurality, and deactivate others. The reflector body substantially prevents bleeding of light to the deactivated LED/reflector/light guide system.
In embodiments, the body is formed of silicone, optionally reflective white silicone. In yet further embodiments, the light guides are formed of transparent silicone. The body can, in embodiments, be a substantially-solid mass. - The LEDs can be arranged in a substantially linear array, and the light emitted from at least a first of the LEDs can be modified by a first light guide and a first discrete reflector arrangement defined by the body to create a light pattern which is different from a plurality of light patterns created by the other LEDs.
- A lens arrangement is also disclosed. The lens can be configured to receive an illumination pattern received from the plurality of LEDs, and project into a more collimated pattern. In embodiments, the lens is a condenser lens. In further embodiments, the lens is extended in the direction of the aligned plurality of LEDs.
- In other embodiments, the module includes a first light-emitting diode (LED) oriented to emit in a first direction; a second LED oriented to emit in a second direction; first and second reflectors defined into a body; the first reflector oriented to modify light received from the first LED, and the second reflector oriented to modify light received from the second LED; first and second light guides included in the first and second reflectors, respectively; and the first light guide configured to receive and direct light from the first LED and the second light guide configured to receive and direct light from the second LED.
- This embodiment might include a control system electronically connected with the first and second LEDs, the control system configured to selectively illuminate either or both of the first and second LEDs. It also might be arranged where the first and second reflectors are formed into a body of reflective material. The first and second light guides might be formed from a transparent material. Also, the first and second reflectors might be made of white silicone, and the first and second light guides be made of transparent silicone.
- A condenser lens can be oriented to receive light exiting the first and second light guides. The lens may extend in the direction in which the first and second LEDs are aligned.
- Illustrative embodiments of the present invention are described in detail below with reference to the attached drawing figures, which are incorporated by reference herein and wherein:
-
FIG. 1 is a top view of a light assembly, in an embodiment; -
FIG. 2 is a cross-sectional side view of the module, in an embodiment; and -
FIG. 3 is front view of the module. - Embodiments of the present invention include a module for a headlamp.
- Disclosed is a
module 100.FIGs. 1-3 show an embodiment of themodule 100, which is, in embodiments, a headlamp for avehicle Module 100, shown in the figures, includes additional components not depicted inFIG. 1 for clarity of illustration. Referring toFIG. 1 , the module has light emission and light modifyingcomponents Light emission equipment 102 includes a plurality of light-emitting diodes (LEDs) 106 mounted on a printed circuit board (PCB) 108. TheLEDs 106 may be used as light sources for theheadlamp 100, either exclusively or in combination with other types of lamps. In embodiments,LEDs 106 are individually addressable. Although the embodiment inFIGs. 1-3 shows a linear array of eleven laterally-spaced-apart LEDs 106 on thePCB 108, in other embodiments the LEDs can be arranged in another kind of array, a matrix, or a single LED could be subjected to the principles herein. In embodiments, thelight emission arrangement 102 is configured for enabling selective illumination of the discrete LEDs in the array for the purpose of creating different light patterns. - The PCB 108 includes or is connected to electronics designed to control the LEDs. The electronic controls may include a headlamp control module having one or more of a computer, a microcontroller, a microprocessor, or a programmable logic controller (PLC) located onboard the vehicle and communicatively coupled with the LED matrices via the one or more printed circuit boards. The controller includes a memory, including a non-transitory medium for storing software, and a processor for executing instructions of the software. The memory may be used to store information used by the controller, including but not limited to algorithms, lookup tables, and computational models. The controller may include one or more switches (e.g., for performing pulse-width modulation). Communication between the controller and the LED/PCB may be by one of a wired and/or wireless communication media.
- In embodiments, the individual LEDs in
plurality 106 are each individually addressable. This enables only certain LEDs to be illuminated if desired in order to create a particular light pattern. For example, substantially all of theLEDs 106 might be illuminated if the desired pattern is intended as a high-beam for the headlight. Alternatively, in the event a low-beam pattern is desired, one or more LEDs inplurality 106 might not be activated to aid in creating the desired pattern. Still further, the selective illumination of particular LEDs might be only one factor in creating a desired pattern using reflection, or one or more lens arrangements. For a high-beam pattern, one or more LEDs in theplurality 106, once fully emitted, might be intended for a location at which it is desired to darken based on a dynamic consideration. For example, systems on the vehicle might detect an oncoming vehicle approaching in a particular segment. By selectively turning off one or more LEDs inplurality 106 which would ordinarily be projecting into that segment, glare caused to the oncoming driver may be eliminated. - In conventional LED lighting arrangements, there is a problem with respect to too much light reflecting on to one LED in the arrangement from other LEDs, e.g., caused by the reflection off of neighboring reflective surfaces. This, in the process of activating select LEDs and leaving some others inactive, light spill-over would make it impossible to completely prevent illumination through one reflector arrangement. This could result in excess glare to an oncoming driver. For example, the deactivated group of LEDs might have been turned off to avoid shining in the eyes of a detected oncoming driver. Upon this occurrence, any illumination leaking into that LEDs reflector/lens arrangement would glare into the oncoming traffic.
- The disclosed module avoids this using the fully divided
module 100. The light modifyingcomponent 104 of themodule 100 is divided into a light-guidingsection 110, and alens 112 from which light exits. In embodiments, thelens 112 is a condenser lens that is used to take the diverging pattern and project it in a more collimated pattern. As can be seen, thecondenser lens 112 is extended in the direction of the aligned plurality ofLEDs 106. The individually-addressable LEDs 106 emit into corresponding LED light-entry points 114. A space is created between theLEDs 106 and eachentry point 114, in an embodiment, by containing each in a housing (not shown). The coupling together of thePCB 108 to the modifyingcomponent 104 is done so that eachLED 106 lines up with a respective light-entry point 114. - The space created between the
LEDs 106 and the entry points 114 is manifested as agap 122. After crossing thegap 122, the light received into each of thepoints 114 travels through each of a plurality of substantially transparent silicone light guides 116. All outer surfaces of the silicone light guides 116 are contained in a reciprocally-shaped reflectivewhite silicone body 118. The result is that whitereflective silicone body 118 creates internal as well as other reflection which redirects the light in a desired pattern out of the guide in the direction of thelens 112. The immersion of the light guides 116 into the whitereflective body 118 results in reflective dividingridges 120 of white reflective silicone (when the device is viewed in the top view of the section ofFIG. 1 ). - From
FIG. 2 it can be seen that the light guides are comprised of outwardly tapering/conicalouter surfaces 121 up to the point they reachlens 112. The cross-section ofFIG. 2 is taken from the line indicated as 2-2 inFIG. 1 . The opposed conical inner wall surfaces 119 of the white silicone body contain the light, and will prevent light bleed upon ultimate transmission out of the module. Also inFIG. 3 , one can see that theridges 120 fromFIG. 2 appear as spaces between each light guide inFIG. 3 . Although not necessarily clear fromFIG. 3 , it should be understood that in many embodiments the circular outputs into thelens 120 from the light guides 116 would be offset to an extent to provide more spread, or to meet some other optical directional objective. - Also seen in
FIG. 2 is that the conical taperedwall 121 of each light guide inplurality 114 extends toward the lens, and then at ahead 123 of eachguide 116, ashelf 124 is formed, on whichunderside ledge 126 of eachlight guide 116 abuts. Also athead 123, an outsidecylindrical surface 128 oflight guide 116 is configured to be received into an interiorcylindrical surface 130 formed in the reflectivewhite silicone body 118, and then abutssurface 128 on thehead 123 of eachlight guide 116. - Although the conical reflectors, in the disclosed embodiment, are defined into a substantially solid silicone body, those skilled in the art will recognize that a different arrangement where silicone or other reflective materials are deposited on less solid or hollow reflector forms could be used instead and still fall within the scope of the broad concepts disclosed herein.
- It should also be noted that, although the figures show all of the LED/reflector/light guide arrangements defined in the
module 100 as being substantially the same, that is not necessarily or even ideally the case. Thus, it should be understood that in embodiments. As discussed already, the individual LEDs inplurality 106 are in many instances individually addressable to create different lighting patterns to create different light patterns due to the LEDs inarray 106 which are selected to create the desired light pattern. Therefore, (i) the LEDs each might be spaced differently behind each light entry point; (ii) each reflector defined within the body might have a different configuration or direction to aim light differently and differently contribute to an overall pattern; and (iii) the light guides may have different configurations within the body to create various effects. This might involve diversity in the central axis for different light guides, as well as deviations from the conical shapes shown, as well as lens spacing and lens configurations. - For example, in order for the same lamp to make the typical high and low beam patterns possible, some of the LEDs will have to throw light down and outside to meet the requirements of a low beam pattern. Similarly, other LEDs will have to direct light generally head on to meet the high-beam requirements. Thus, optical diversity between each LED/light guide/reflector system is contemplated herein and is an aspect of what is disclosed.
- This diversity in the optics serving each LED is also useful in deactivating certain LEDs to avoid glare upon a vehicle location in an automatic dimming arrangement. Thus, a headlamp according to the general principles expressed regarding the embodiments disclosed in
FIGs. 1-3 will contemplate differently directed optics depending on the application. - In embodiments, the overall shape of the
PCB 108 is substantially or completely rectangular, and substantially matches the shape of arear wall 132 of thelight modifier system 104. More generally, the module is formed as some sort of "block." The term "block" as used herein, is not intended to imply any particular shape other than that is a mass of some uniformity (e.g., could have rounding, be somewhat elliptical, etc.) Thus, the term should not be narrowly construed. - The
rear wall 132 comprises theentry point walls 134 and back portion of thebody 118, which exist, in embodiments, in substantially the same plane, or are slightly offset in parallel planes. Because the back portion of thebody 118 and the shape of thePCB 108 are substantially the same, prefabricated LED positions can be easily mated with the light-entry points 114 so that the two are optically in line. This makes the device easier to manufacture. Although not shown, it is possible that spacing devices of some sort exist between the forward surface of thePCB 108 and therear wall 132 of the body 118 (or are incorporated into the housing) in order to create uniform spacing of a given dimension, ensuring that the front of thePCB 108 and therear body surface 132 are opposed and parallel. - Collectively, the light source and
light modifier systems LEDs 106, the pattern may be a reaction to a detected status, e.g., the presence and location of an on-coming vehicle. - The overall configuration causes the light to propagate through each distinctive light guide portion to the exit optics. The containment of the light prior to entering the lens prevents light bleed. Further, the block-like shape of the overall device makes the matching up of parts (e.g., PCB to light guide module to lens) easy to achieve, and additionally, the silicone body configuration facilitates easy locating and attachment and reattachment into a vehicle housing.
- Many different arrangements of the various components depicted, as well as components not shown, are possible without departing from the scope of the present invention defined in the appended claims. Embodiments of the present invention have been described with the intent to be illustrative rather than restrictive. Alternative embodiments will become apparent to those skilled in the art that do not depart from its scope. A skilled artisan may develop alternative means of implementing the aforementioned improvements without departing from the scope of the present invention as defined in the appended claims.
- It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations and are contemplated within the scope of the claims. Not all operations listed in the various figures need be carried out in the specific order described.
Claims (14)
- A vehicle headlamp (100), comprising:a plurality of light-emitting diodes, LEDs, (106) mounted on a substrate (108);a plurality of light guides (116) each having a light entry (114), each light entry being oriented to receive light emitted from a particular LED (106) in the plurality;a body (118) comprised of a reflective material, the body substantially including the plurality of light guides (116) inside of a plurality of discretely defined reflector arrangements;an outer lens (112) adapted to receive light from the plurality of light guides (116) and project the light out of the headlamp; andwherein the plurality of discretely defined reflector arrangements formed within the body (118) of reflective material each form a conical passageway of a circular cross-section having an outwardly tapering cross section moving from a location at the light entry towards the outer lens (112) and wherein each of the of light guides (116) has an exterior surface which is included inside and conforms to an interior shape of the conical passageway defined inside the body (118) of reflective material,wherein the plurality of light guides (116) and the body (118) containing the light guides extend up to the outer lens (112), such that light propagated through the light guides (116) is contained prior to entering the outer lens (112), andwherein at a head (123) of each light guide (116) a shelf (124) is formed in the body (118), on which underside a ledge (126) of the respective light guide (116) abuts; and at the head (123) of each light guide (124) an outside cylindrical surface (128) of the light guide (116) is configured to be received into an interior cylindrical surface (130) formed in the body (118) and then abutting the outside cylindrical surface (128) of the respective light guide (116).
- The headlamp of claim 1 wherein the at least some LEDs (106) in the plurality are dimmed to avoid glare to a selected location.
- The headlamp of claim 1 or 2 comprising:
a control system electronically connected with the plurality of LEDs (106), the control system configured to selectively illuminate at least some LEDs (106) in the plurality, and deactivate at least one other LED (106), the body (118) substantially preventing lateral bleeding of light to the deactivated LED (106). - The headlamp of any one of claims 1 to 3 wherein the body (118) is formed of silicone.
- The headlamp of claim 4 wherein the body (118) is formed of reflective white silicone.
- The headlamp of any one of claims 1 to 5 wherein the light guides (116) are formed of transparent silicone.
- The headlamp of claim 6 wherein the body (118) of reflective material is formed of reflective silicone, and the light guides (116) are formed within the body (118) of reflected material to form a common substantially-solid mass.
- The headlamp of any one of claims 1 to 7 wherein the plurality of LEDs (106) are arranged in a substantially linear array.
- The headlamp of any one of claims 1 to 8 wherein light emitted from at least a first of the plurality of LEDs (106) mounted on the substrate (108) is modified by a first light guide (116) and a first discrete reflector arrangement defined by the body (118) to create a light pattern which is different from a plurality of light patterns created by the other LEDs (106) in the plurality.
- The headlamp of any one of claims 1 to 9 wherein the outer lens (112) is configured to receive an illumination pattern received from the plurality of LEDs (106), and project into a more collimated pattern.
- The headlamp of claim 10 wherein the outer lens (112) is a condenser lens
- The headlamp of any one of claims 1 to 11 wherein the outer lens (112) is extended in the direction of the aligned plurality of LEDs (106).
- The headlamp of any one of claims 1 to 12, comprising:a first LED (106) oriented to emit light in a first direction;a second LED (106) oriented to emit light in a second direction;first and second reflectors defined into the body (118);the first reflector oriented to modify light received from the first LED (106), and the second reflector oriented to modify light received from the second LED (106);first and second light guides (116) included in the first and second reflectors, respectively; andthe first light guide (116) configured to receive and direct light from the first LED (106) and the second light guide (116) configured to receive and direct light from the second LED (106).
- The headlamp of claim 13 whereinthe outer lens (112) is a condenser lens oriented to receive light exitingthe first and second light guides (116), the condenser lens extending outside of the reflector body (118).
Applications Claiming Priority (2)
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US201862744211P | 2018-10-11 | 2018-10-11 | |
PCT/US2019/055582 WO2020077062A1 (en) | 2018-10-11 | 2019-10-10 | Light module |
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Publication Number | Publication Date |
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EP3864343A4 EP3864343A4 (en) | 2021-08-18 |
EP3864343A1 EP3864343A1 (en) | 2021-08-18 |
EP3864343B1 true EP3864343B1 (en) | 2023-11-29 |
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EP19871611.0A Active EP3864343B1 (en) | 2018-10-11 | 2019-10-10 | Light module |
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US (1) | US11143374B2 (en) |
EP (1) | EP3864343B1 (en) |
ES (1) | ES2971333T3 (en) |
WO (1) | WO2020077062A1 (en) |
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WO2022065030A1 (en) * | 2020-09-24 | 2022-03-31 | 株式会社小糸製作所 | Vehicular lamp and vehicular lamp production method |
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- 2019-10-10 EP EP19871611.0A patent/EP3864343B1/en active Active
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EP3864343A4 (en) | 2021-08-18 |
EP3864343A1 (en) | 2021-08-18 |
WO2020077062A1 (en) | 2020-04-16 |
ES2971333T3 (en) | 2024-06-04 |
US11143374B2 (en) | 2021-10-12 |
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